Merge branch 'kn/receive-report-hook' into jch
A new hook 'report' is added to 'git receive-pack', which runs after reference updates and allows the server to filter or modify the packet-line status report sent back to the client. * kn/receive-report-hook: receive-pack: coccinelle fix hook: introduce the receive-report hook receive-pack: move message generation to separate function receive-pack: drop static variables to track report status version doc: add proc-receive hook info in 'git-receive-pack.adoc'
Junio C Hamano
commit
e0cd7bd5b0
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@ -236,6 +236,23 @@ if the repository is packed and is served via a dumb transport.
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exec git update-server-info
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----
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PROC-RECEIVE HOOK
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-----------------
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This hook is invoked by linkgit:git-receive-pack[1]. If the server has
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set the multi-valued config variable `receive.procReceiveRefs`, and the
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commands sent to 'receive-pack' have matching reference names, these
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commands will be executed by this hook, instead of by the internal
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`execute_commands()` function. This hook is responsible for updating
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the relevant references and reporting the results back to 'receive-pack'.
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RECEIVE-REPORT HOOK
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-------------------
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This hook is invoked by 'git-receive-pack' after all the ref updates
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have been applied but before the report is sent to the client. The hook
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receives the complete report in pkt-line format on stdin and its stdout
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replaces the report sent to the client, which allows the hook to rewrite
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the outcomes or abort the push completely. See linkgit:githooks[5] for
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the full protocol description.
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QUARANTINE ENVIRONMENT
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----------------------
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@ -527,6 +527,67 @@ The exit status of the hook is ignored for any state except for the
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status will cause the transaction to be aborted. The hook will not be
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called with "aborted" state in that case.
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receive-report
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~~~~~~~~~~~~~~
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This hook is invoked by linkgit:git-receive-pack[1] when it reacts to
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`git push` and updates references in its repository. It executes on
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the repository once after all refs have been updated and after all
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accepted ref changes are applied to the repository, but before the
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pkt-line encoded status report is sent back to the client.
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The hook receives the complete pkt-line encoded status report on
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standard input, see linkgit:gitprotocol-pack[5] for details on the
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structure. The hook's standard output entirely replaces the report
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that is sent to the client. The hook must write a valid pkt-line
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encoded report in the same format it received. The hook's stdout is
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fully buffered by `receive-pack` before any data is sent to the client,
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so the hook's exit status is known before the client receives anything.
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There are three distinct ways the hook can affect the push outcome:
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* To reject the push, modify the unpack status from `ok` to the required
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error message. While `git-push` will fail, individual references may
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still show success messages unless modified.
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* To reject individual ref updates while keeping `receive-pack` alive,
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rewrite the corresponding `ok <refname>` lines to
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`ng <refname>[ <reason>]` lines in the output and exit with status 0.
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The client will then mark those specific refs as rejected while
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treating any `ok` refs as successful. The push as a whole is
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considered failed if any ref is `ng`, and `git push` will exit with
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a non-zero status on the client side.
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* To abort the entire push unconditionally, exit with a non-zero
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status. In this case the hook's stdout is discarded, `receive-pack`
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modifies all references to be rejected with a 'receive-report hook
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failed' error.
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Any output written to standard error is forwarded to the client over
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the sideband channel and will appear as `remote:` lines on clients
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using 'git-push(1)', regardless of the hook's exit status. Writing to
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standard error alone does not affect the push outcome.
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Note that by the time this hook runs, all ref updates have already been
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applied to the repository. Neither a non-zero exit nor rewriting refs
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to `ng` rolls back any ref changes that were already committed
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server-side. The hook can cause the client to perceive the push as
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failed, but cannot undo the server-side updates.
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This means that reporting a reference as `ng` makes the client believe
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the update did not happen while the server has in fact applied it. The
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client leaves its remote-tracking reference at its old value, and a
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later `git fetch` may reveal the very update that the push reported as
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rejected. Neither Git nor the server can reconcile this; only the user,
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by fetching again, will find out.
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This hook is therefore only appropriate for servers which can guarantee
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that a rejected update is not observable by any reader, for example
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because the committed transaction produces a candidate state that is
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discarded rather than published. On a repository where a committed
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reference update is immediately visible, using this hook to reject a
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push will leave the pusher with a view that does not match the server.
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push-to-checkout
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~~~~~~~~~~~~~~~~
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@ -53,6 +53,12 @@ enum deny_action {
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DENY_UPDATE_INSTEAD
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};
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enum report_status_version {
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REPORT_STATUS_UNKNOWN = 0,
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REPORT_STATUS_V0,
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REPORT_STATUS_V2,
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};
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static int deny_deletes;
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static int deny_non_fast_forwards;
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static enum deny_action deny_current_branch = DENY_UNCONFIGURED;
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@ -64,8 +70,6 @@ static int advertise_atomic_push = 1;
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static int advertise_push_options;
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static int advertise_sid;
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static off_t max_input_size;
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static int report_status;
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static int report_status_v2;
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static int use_sideband;
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static int use_atomic;
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static int use_push_options;
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@ -988,6 +992,41 @@ static int run_update_hook(struct command *cmd)
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return code;
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}
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static int run_receive_report_hook(struct strbuf *report)
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{
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struct child_process proc = CHILD_PROCESS_INIT;
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struct async sideband_async;
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int sideband_async_started = 0;
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int saved_stderr = -1;
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struct strbuf out = STRBUF_INIT;
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const char *hook_path;
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int ret;
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hook_path = find_hook(the_repository, "receive-report");
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if (!hook_path)
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return 0;
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strvec_push(&proc.args, hook_path);
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proc.trace2_hook_name = "receive-report";
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prepare_sideband_async(&sideband_async, &saved_stderr,
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&sideband_async_started);
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sigchain_push(SIGPIPE, SIG_IGN);
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ret = pipe_command(&proc, report->buf, report->len, &out,
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report->len, NULL, 0);
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sigchain_pop(SIGPIPE);
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finish_sideband_async(&sideband_async, saved_stderr,
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sideband_async_started);
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if (!ret)
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strbuf_swap(&out, report);
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strbuf_release(&out);
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return ret;
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}
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static struct command *find_command_by_refname(struct command *list,
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const char *refname)
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{
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@ -2191,7 +2230,8 @@ static void queue_commands_from_cert(struct command **tail,
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}
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static struct command *read_head_info(struct packet_reader *reader,
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struct oid_array *shallow)
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struct oid_array *shallow,
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enum report_status_version *version)
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{
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struct command *commands = NULL;
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struct command **p = &commands;
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@ -2217,9 +2257,9 @@ static struct command *read_head_info(struct packet_reader *reader,
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const char *client_sid;
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size_t len = 0;
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if (parse_feature_request(feature_list, "report-status"))
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report_status = 1;
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*version = REPORT_STATUS_V0;
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if (parse_feature_request(feature_list, "report-status-v2"))
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report_status_v2 = 1;
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*version = REPORT_STATUS_V2;
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if (parse_feature_request(feature_list, "side-band-64k"))
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use_sideband = LARGE_PACKET_MAX;
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if (parse_feature_request(feature_list, "quiet"))
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@ -2409,67 +2449,72 @@ static void update_shallow_info(struct command *commands,
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free(ref_status);
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}
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static void report(struct command *commands, const struct strbuf *unpack_status)
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static void override_cmds_error(struct command *commands, const char *err)
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{
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struct command *cmd;
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struct strbuf buf = STRBUF_INIT;
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packet_buf_write(&buf, "unpack %s\n",
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unpack_status->len ? unpack_status->buf : "ok");
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for (cmd = commands; cmd; cmd = cmd->next) {
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if (!cmd->error_string)
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packet_buf_write(&buf, "ok %s\n",
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cmd->ref_name);
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else
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packet_buf_write(&buf, "ng %s %s\n",
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cmd->ref_name, cmd->error_string);
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for (struct command *cmd = commands; cmd; cmd = cmd->next) {
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FREE_AND_NULL(cmd->error_string_owned);
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cmd->error_string = err;
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}
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packet_buf_flush(&buf);
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if (use_sideband)
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send_sideband(1, 1, buf.buf, buf.len, use_sideband);
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else
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write_or_die(1, buf.buf, buf.len);
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strbuf_release(&buf);
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}
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static void report_v2(struct command *commands, const struct strbuf *unpack_status)
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/*
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* Generate the response to be sent to the client invoking 'git-receive-pack(1)'.
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*/
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static void generate_report(struct strbuf *buf, struct command *commands,
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const struct strbuf *unpack_status,
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enum report_status_version version)
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{
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struct command *cmd;
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struct strbuf buf = STRBUF_INIT;
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struct ref_push_report *report;
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packet_buf_write(&buf, "unpack %s\n",
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packet_buf_write(buf, "unpack %s\n",
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unpack_status->len ? unpack_status->buf : "ok");
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for (cmd = commands; cmd; cmd = cmd->next) {
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struct ref_push_report *report;
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int count = 0;
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if (cmd->error_string) {
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packet_buf_write(&buf, "ng %s %s\n",
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cmd->ref_name,
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cmd->error_string);
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if (cmd->error_string)
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packet_buf_write(buf, "ng %s %s\n",
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cmd->ref_name, cmd->error_string);
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else
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packet_buf_write(buf, "ok %s\n", cmd->ref_name);
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if (version != REPORT_STATUS_V2 || cmd->error_string)
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continue;
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}
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packet_buf_write(&buf, "ok %s\n",
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cmd->ref_name);
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for (report = cmd->report; report; report = report->next) {
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if (count++ > 0)
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packet_buf_write(&buf, "ok %s\n",
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packet_buf_write(buf, "ok %s\n",
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cmd->ref_name);
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if (report->ref_name)
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packet_buf_write(&buf, "option refname %s\n",
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packet_buf_write(buf, "option refname %s\n",
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report->ref_name);
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if (report->old_oid)
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packet_buf_write(&buf, "option old-oid %s\n",
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packet_buf_write(buf, "option old-oid %s\n",
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oid_to_hex(report->old_oid));
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if (report->new_oid)
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packet_buf_write(&buf, "option new-oid %s\n",
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packet_buf_write(buf, "option new-oid %s\n",
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oid_to_hex(report->new_oid));
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if (report->forced_update)
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packet_buf_write(&buf, "option forced-update\n");
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packet_buf_write(buf, "option forced-update\n");
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}
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}
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packet_buf_flush(&buf);
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packet_buf_flush(buf);
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}
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|
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static void report(struct command *commands, const struct strbuf *unpack_status,
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enum report_status_version version)
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{
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struct strbuf buf = STRBUF_INIT;
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generate_report(&buf, commands, unpack_status, version);
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|
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if (run_receive_report_hook(&buf)) {
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strbuf_reset(&buf);
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override_cmds_error(commands, "receive-report hook failed");
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generate_report(&buf, commands, unpack_status, version);
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}
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|
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if (use_sideband)
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send_sideband(1, 1, buf.buf, buf.len, use_sideband);
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|
|
@ -2500,6 +2545,7 @@ int cmd_receive_pack(int argc,
|
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struct shallow_info si;
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struct packet_reader reader;
|
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struct odb_transaction *transaction = NULL;
|
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enum report_status_version version = REPORT_STATUS_UNKNOWN;
|
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|
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struct option options[] = {
|
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OPT__QUIET(&quiet, N_("quiet")),
|
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|
|
@ -2563,7 +2609,7 @@ int cmd_receive_pack(int argc,
|
|||
PACKET_READ_CHOMP_NEWLINE |
|
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PACKET_READ_DIE_ON_ERR_PACKET);
|
||||
|
||||
if ((commands = read_head_info(&reader, &shallow))) {
|
||||
if ((commands = read_head_info(&reader, &shallow, &version))) {
|
||||
struct string_list push_options = STRING_LIST_INIT_DUP;
|
||||
struct strbuf unpack_status = STRBUF_INIT;
|
||||
|
||||
|
|
@ -2596,10 +2642,16 @@ int cmd_receive_pack(int argc,
|
|||
&push_options);
|
||||
odb_transaction_finalize(transaction);
|
||||
sigchain_push(SIGPIPE, SIG_IGN);
|
||||
if (report_status_v2)
|
||||
report_v2(commands, &unpack_status);
|
||||
else if (report_status)
|
||||
report(commands, &unpack_status);
|
||||
|
||||
switch (version) {
|
||||
case REPORT_STATUS_V2:
|
||||
case REPORT_STATUS_V0:
|
||||
report(commands, &unpack_status, version);
|
||||
break;
|
||||
case REPORT_STATUS_UNKNOWN:
|
||||
break;
|
||||
}
|
||||
|
||||
sigchain_pop(SIGPIPE);
|
||||
run_receive_hook(commands, "post-receive", 1, NULL,
|
||||
&push_options);
|
||||
|
|
|
|||
|
|
@ -653,6 +653,7 @@ integration_tests = [
|
|||
't5409-colorize-remote-messages.sh',
|
||||
't5410-receive-pack.sh',
|
||||
't5411-proc-receive-hook.sh',
|
||||
't5412-receive-report-hook.sh',
|
||||
't5500-fetch-pack.sh',
|
||||
't5501-fetch-push-alternates.sh',
|
||||
't5502-quickfetch.sh',
|
||||
|
|
|
|||
|
|
@ -0,0 +1,257 @@
|
|||
#!/bin/sh
|
||||
|
||||
test_description='test receive-report hook'
|
||||
|
||||
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
|
||||
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
|
||||
|
||||
. ./test-lib.sh
|
||||
|
||||
. "$TEST_DIRECTORY"/t5411/common-functions.sh
|
||||
|
||||
URL_PREFIX="\.\."
|
||||
|
||||
test_expect_success "setup workbench" '
|
||||
git init workbench &&
|
||||
create_commits_in workbench A B
|
||||
'
|
||||
|
||||
test_expect_success "no report hook, push succeeds" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
git init --bare upstream &&
|
||||
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
git -C workbench push origin $B:refs/heads/main >out 2>&1 &&
|
||||
|
||||
make_user_friendly_and_stable_output <out >actual &&
|
||||
cat >expect <<-\EOF &&
|
||||
To ../upstream
|
||||
<COMMIT-A>..<COMMIT-B> <COMMIT-B> -> main
|
||||
EOF
|
||||
test_cmp expect actual
|
||||
'
|
||||
|
||||
test_expect_success "passthrough does not alter report" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
git init --bare upstream &&
|
||||
|
||||
test_hook -C upstream --setup receive-report <<-\EOF &&
|
||||
cat
|
||||
EOF
|
||||
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
git -C workbench push origin $B:refs/heads/main >out 2>&1 &&
|
||||
|
||||
make_user_friendly_and_stable_output <out >actual &&
|
||||
cat >expect <<-\EOF &&
|
||||
To ../upstream
|
||||
<COMMIT-A>..<COMMIT-B> <COMMIT-B> -> main
|
||||
EOF
|
||||
test_cmp expect actual
|
||||
'
|
||||
|
||||
test_expect_success "non-zero exit reports as hook failed" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
|
||||
git init --bare upstream &&
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
|
||||
test_hook -C upstream --setup receive-report <<-\EOF &&
|
||||
exit 1
|
||||
EOF
|
||||
|
||||
test_must_fail git -C workbench push origin $B:refs/heads/main >out 2>&1 &&
|
||||
make_user_friendly_and_stable_output <out >actual &&
|
||||
cat >expect <<-\EOF &&
|
||||
To ../upstream
|
||||
! [remote rejected] <COMMIT-B> -> main (receive-report hook failed)
|
||||
EOF
|
||||
test_cmp expect actual
|
||||
'
|
||||
|
||||
test_expect_success "hook is invoked and receives report on stdin" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
|
||||
git init --bare upstream &&
|
||||
test_hook -C upstream --setup receive-report <<-EOF &&
|
||||
tee raw
|
||||
EOF
|
||||
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
git -C workbench push origin $B:refs/heads/main >out 2>&1 &&
|
||||
|
||||
make_user_friendly_and_stable_output <out >actual &&
|
||||
cat >expect <<-EOF &&
|
||||
To ../upstream
|
||||
<COMMIT-A>..<COMMIT-B> <COMMIT-B> -> main
|
||||
EOF
|
||||
test_cmp expect actual &&
|
||||
|
||||
test-tool pkt-line unpack <upstream/raw >actual-report &&
|
||||
cat >expect-report <<-EOF &&
|
||||
unpack ok
|
||||
ok refs/heads/main
|
||||
0000
|
||||
EOF
|
||||
test_cmp expect-report actual-report
|
||||
'
|
||||
|
||||
test_expect_success "hook can modify the report sent to client" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
|
||||
git init --bare upstream &&
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
|
||||
test_hook -C upstream --setup receive-report <<-\EOF &&
|
||||
test-tool pkt-line unpack |
|
||||
sed "s/^ok /ng /" |
|
||||
test-tool pkt-line pack
|
||||
EOF
|
||||
|
||||
test_must_fail git -C workbench push origin $B:refs/heads/main >out 2>&1 &&
|
||||
make_user_friendly_and_stable_output <out >actual &&
|
||||
cat >expect <<-\EOF &&
|
||||
To ../upstream
|
||||
! [remote rejected] <COMMIT-B> -> main (failed)
|
||||
EOF
|
||||
test_cmp expect actual
|
||||
'
|
||||
|
||||
test_expect_success "hook can modify the unpack status" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
|
||||
git init --bare upstream &&
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
|
||||
test_hook -C upstream --setup receive-report <<-\EOF &&
|
||||
test-tool pkt-line unpack |
|
||||
sed "s/^unpack ok$/unpack push failed due to server error/" |
|
||||
test-tool pkt-line pack
|
||||
EOF
|
||||
|
||||
test_must_fail git -C workbench push origin $B:refs/heads/main >out 2>&1 &&
|
||||
test_grep "error: remote unpack failed: push failed due to server error" out &&
|
||||
make_user_friendly_and_stable_output <out >actual &&
|
||||
cat >expect <<-\EOF &&
|
||||
To ../upstream
|
||||
<COMMIT-A>..<COMMIT-B> <COMMIT-B> -> main
|
||||
EOF
|
||||
test_cmp expect actual
|
||||
'
|
||||
|
||||
test_expect_success "hook can report a custom failure message" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
|
||||
git init --bare upstream &&
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
|
||||
test_hook -C upstream --setup receive-report <<-\EOF &&
|
||||
echo "push rejected: service X is down" >&2
|
||||
test-tool pkt-line unpack |
|
||||
sed "s/^ok \(.*\)/ng \1 service-x-is-down/" |
|
||||
test-tool pkt-line pack |
|
||||
tee raw
|
||||
EOF
|
||||
|
||||
test_must_fail git -C workbench push origin $B:refs/heads/main >out 2>&1 &&
|
||||
test_grep "push rejected: service X is down" out &&
|
||||
|
||||
test-tool pkt-line unpack <upstream/raw >actual-report &&
|
||||
cat >expect-report <<-\EOF &&
|
||||
unpack ok
|
||||
ng refs/heads/main service-x-is-down
|
||||
0000
|
||||
EOF
|
||||
test_cmp expect-report actual-report
|
||||
'
|
||||
|
||||
test_expect_success "hook stderr with zero exit status code" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
|
||||
git init --bare upstream &&
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
|
||||
test_hook -C upstream --setup receive-report <<-\EOF &&
|
||||
echo "push rejected: service X is down" >&2
|
||||
tee raw
|
||||
EOF
|
||||
|
||||
git -C workbench push origin $B:refs/heads/main >out 2>&1 &&
|
||||
test_grep "push rejected: service X is down" out &&
|
||||
|
||||
test-tool pkt-line unpack <upstream/raw >actual-report &&
|
||||
cat >expect-report <<-\EOF &&
|
||||
unpack ok
|
||||
ok refs/heads/main
|
||||
0000
|
||||
EOF
|
||||
test_cmp expect-report actual-report
|
||||
'
|
||||
|
||||
test_expect_success "non-zero exit with pre-existing ng from proc-receive" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
|
||||
git init --bare upstream &&
|
||||
git -C upstream config receive.procReceiveRefs refs/for &&
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
|
||||
# Use a proc-receive hook to generate a dynamic error string.
|
||||
# This is used to capture any leaks stemming from overriding the
|
||||
# error message via the receive-report.
|
||||
test_hook -C upstream --setup proc-receive <<-\EOF &&
|
||||
test-tool proc-receive -r "ng refs/for/main/topic push-rejected-by-service-x"
|
||||
EOF
|
||||
|
||||
test_hook -C upstream --setup receive-report <<-\EOF &&
|
||||
tee raw
|
||||
exit 1
|
||||
EOF
|
||||
|
||||
test_must_fail git -C workbench push origin HEAD:refs/for/main/topic >out 2>&1 &&
|
||||
test_grep "receive-report hook failed" out &&
|
||||
|
||||
test-tool pkt-line unpack <upstream/raw >actual-report &&
|
||||
cat >expect-report <<-\EOF &&
|
||||
unpack ok
|
||||
ng refs/for/main/topic push-rejected-by-service-x
|
||||
0000
|
||||
EOF
|
||||
test_cmp expect-report actual-report
|
||||
'
|
||||
|
||||
test_expect_success "hook stderr is relayed to client via sideband" '
|
||||
test_when_finished "rm -rf upstream" &&
|
||||
test_when_finished "git -C workbench remote remove origin" &&
|
||||
|
||||
git init --bare upstream &&
|
||||
git -C workbench remote add origin ../upstream &&
|
||||
git -C workbench push origin $A:refs/heads/main &&
|
||||
|
||||
test_hook -C upstream --setup receive-report <<-\EOF &&
|
||||
echo "hook-stderr-message" >&2
|
||||
exit 1
|
||||
EOF
|
||||
|
||||
test_must_fail git -C workbench push origin $B:refs/heads/main >out 2>&1 &&
|
||||
test_grep "remote: hook-stderr-message" out
|
||||
'
|
||||
|
||||
test_done
|
||||
Loading…
Reference in New Issue